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libc: support RTLD_DEFAULT in dlsym

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issue #2791
This commit is contained in:
Sebastian Sumpf 2017-09-27 09:47:27 +02:00 committed by Christian Helmuth
parent 419dc40c4d
commit bfd9c48039
1 changed files with 9 additions and 2 deletions
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11
repos/libports/src/lib/libc/dynamic_linker.cc
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@ -87,13 +87,20 @@ void *dlopen(const char *name, int mode)
void *dlsym(void *handle, const char *name) void *dlsym(void *handle, const char *name)
{ {
if (handle == nullptr || handle == RTLD_NEXT || handle == RTLD_DEFAULT || if (handle == nullptr || handle == RTLD_NEXT || handle == RTLD_SELF) {
handle == RTLD_SELF) {
snprintf(err_str, MAX_ERR, "Unsupported handle %p\n", handle); snprintf(err_str, MAX_ERR, "Unsupported handle %p\n", handle);
return nullptr; return nullptr;
} }
try { try {
if (handle == RTLD_DEFAULT) {
static Libc::Allocator global_alloc;
return Shared_object(*genode_env, global_alloc, nullptr,
Shared_object::BIND_LAZY,
Shared_object::KEEP).lookup(name);
}
return to_object(handle)->lookup(name); return to_object(handle)->lookup(name);
} catch (...) { } catch (...) {
snprintf(err_str, MAX_ERR, "Symbol '%s' not found\n", name); snprintf(err_str, MAX_ERR, "Symbol '%s' not found\n", name);